Abstract:
A magnetic toner having magnetic toner particles each containing at least a binder resin and a magnetic iron oxide particle, in which: when a solution is prepared by dissolving the magnetic iron oxide particles in an acidic aqueous solution and an Fe element amount in a solution in which all the magnetic iron oxide particles are dissolved is defined as a total Fe element amount, a ratio X of the amount of Fe(2+) in a solution in which the magnetic iron oxide particles are dissolved to a state where 10 mass % of the total Fe element amount is present in the solution (solution having an Fe element-dissolving ratio of 10 mass %) to an Fe element amount in the solution having a specific Fe element-dissolving ratio; and the dielectric loss tangents of the magnetic toner measured at a temperature of 40° C. satisfy specific conditions.
Abstract:
Employed are a resin-coated ferrite carrier for an electrophotographic developer including a ferrite carrier core material having a BET specific surface area of 900 to 5,000 cm2/g and an apparent density of 2.30 to 2.80 g/cm3, and the electrophotographic developer using this resin-coated ferrite carrier.
Abstract translation:使用的是用于电子照相显影剂的树脂涂覆的铁氧体载体,其包括BET比表面积为900至5000cm 2 / g并且表观密度为2.30至2.80g / cm 3的铁氧体载体芯材料 3和使用该树脂涂覆的铁氧体载体的电子照相显影剂。
Abstract:
The present invention provides a toner for electrostatic latent image development and a method of magnetic monocomponent development using the toner which can prevent the toner adhesion to a photoconductor for a long time period and can obtain an image having high quality by maintaining functions of the toner for a long time period or by favorably adjusting the conveying property of the toner on a developing sleeve. In a toner for electrostatic latent image development which contains toner particles and inorganic particles and a method of development using the toner, the toner particles exhibit a shape factor SF-1 which satisfies the relationship 115≦SF-1≦150 and a shape factor SF-2 which satisfies the relationship 115≦SF-2≦145 and, at the same time, a quantity of inorganic particles which are in a floating state is set to a value which falls within a range from 10 weight % to 25 weight % with respect to the total quantity of the inorganic particles.
Abstract:
Apparatus and methods for applying powder coatings to a substrate using a magnetic brush developer, including a method and apparatus for applying powder coatings to a substrate either directly or by intermediate transfer using a magnetic brush with a rotating magnetic field and for preparing the coating materials. The apparatus and method includes a supply of prepared powder coating material, a magnetic brush having a rotating magnetic field for applying the powder coating material to the substrate; and an electric field between the magnetic brush having a rotating magnetic field and the substrate.
Abstract:
The present invention provides a one-component magnetic toner for developing an electrostatic charge image, which do not cause an image defect by toner aggregation or fusion even though a device is miniaturized and the processing speed of the device is accelerated, and which allows easy recycling of a toner cartridge. The one-component magnetic toner for developing an electrostatic charge image of the present invention is one comprising: toner particles comprising fine magnetic particles (A) and a binder resin; and fine magnetic particles (B) externally added to the toner particles, in which the maximum permeability (μmA) of the fine magnetic particles (A) contained in the toner particles and the maximum permeability (μmB) of the fine magnetic particles (B) externally added to the toner particles satisfy a relationship represented by the following formula (1) μmB/μmA≦1.8 . (1)
Abstract:
There is provided a capsulated toner which has low-temperature fixing ability, good storage stability, excellent charge stability, high fixing strength to a sheet paper, and low consumption, and is capable of forming a color image of high-definition, high-gloss, and high-density. The capsulated toner for electrophotography includes a shell layer containing a cycloolefin copolymer resin and a core particle including a synthetic resin different from the cycloolefin copolymer resin, wherein the capsulated toner has a core/shell type structure.
Abstract:
Provided is a magnetic toner comprising magnetic toner particles each comprising at least a binder resin and a magnetic iron oxide, the magnetic toner being excellent in developability and environmental stability, and being capable of reducing a toner consumption. A saturation magnetization σs and a remanent magnetization σr of the magnetic toner in a measured magnetic field of 795.8 kA/m are arranged in the range of 5 to 60 Am2/kg and in the range of 0.1 to 10.0 Am2/kg, respectively, and the binder resin having a polyester component polymerized by using a Ti chelate compound as a catalyst is used.
Abstract:
A toner having a high strength magnetite in an amount of from about 10 to about 40 weight percent, wherein the magnetite includes a material selected from the group consisting of FeO, Fe2O3, Fe3O4, gamma iron oxides, cobalt-gamma iron oxides, and mixtures thereof, and further including a developer having a carrier and toner as just described.
Abstract translation:具有约10至约40重量%的高强度磁铁矿的调色剂,其中所述磁铁矿包括选自FeO,Fe 2 O 3 O 3, 氧化铁,钴-γ铁氧化物及其混合物,还包括具有如上所述的载体和调色剂的显影剂。
Abstract:
The present invention provides a toner for electrostatic charge development comprising an amorphous polyester resin, a releasing agent, and magnetic metal particles covered with a resin the main component of which is a crystalline polyester resin.
Abstract:
The invention aims to provide magnetic single-component toner of which externally added magnetic powder is not buried into the toner even when the toner has experienced stress due to use and thermal stress, which is superior in stability of electrostatic charge and allow images without lack in parts of the image to be formed stably, and with which occurrence of a filming phenomenon of the photoreceptor drum and dielectric breakdown due to charge leaks to the photoreceptor drum are prevented and stable formation of thin layer of toner on the developing sleeve for a long period can be secured, and to provide a developing unit and image forming apparatus using the toner. The magnetic single-component toner contains in its binder resin at least magnetic powder, and externally added with magnetic powder of basically polyhedral grain shape with apexes and ridges being rounded to be formed into curved surfaces such that portions deemed as straight lines remain on the circumference of the projected figure of the grain, and said magnetic powder externally added is of volume specific resistance of in a range of 102-109 Ωcm.